Pump jack



May 14, 1929.

C. H. BALDWIN PUMP. JACK 2 sheets-sheet Filed Deo. 6, 1927 x May 14, 1929. c. H.' BALDWIN PUMP JACK 2 Smets-sheet 2 Filed Dec. 6, 1927 INVENToR. el Baha/ily,

Patented May 14, 1929.

" UNITED STATES CLOISE'H. BALDWIN, 0F FORT WORTH, TEXAS.

:PUMP nox.

Application filed December This invention relates to a new and improved pump jack assembly, and has .for its object to provide, in a manner as hereinafter set forth, an assembly of such class constituting a single self contained unit thereby y simplifving construction and installation and further materially reducing the cost of the maintenance over forms of pump jack assemblies now in use. Y

A further object of the invention is to provide, in a manner as hereinafter set forth, a pump jack assembly including means for producing at all times an absolutely vertical pumping stroke. Y

A further object of the invention 1s to provide, in a manner as hereinafter set forth a pump jack assembly including an oscillatory beam and with means to prevent the sagging or distortion thereof during its operation.

Further objects of the invention are to provide, in a manner as hereinafter set forth a. pump jack assembly which is comparatively simple in its construction and arrangement, strong, durable, compact, thoroughly efficient in its use, readily assembled, conveniently 1nstalled and comparatively inexpensive to set pWith the foregoing and other objects in view the invention consists ofthe novel construction, combination and arrangement of parts as hereinafter more specifically described and illustrated in the accompanying drawings wherein is shown an embodiment of the invention, but it is to he understood that changes, variations andvmodifications can'be Figure 6 is atop plan View of a base plate.v

Figure 7 is a side elevation of the bearing element for the oscillatory swing.

Figure 8 is av section on line 8 8 Figure 1.

`Figure 9 is a section on line 9 9 Figure 1.

Figure 10 is a section on line 10--10 Figr Y Y ity to one end of the latter, by the holdfast dee, 1927. serial No. 238,175.V

maining portion perpendicular as at 8. The

perpendicular portions 8 of the standards Yare arranged at the upper ends thereof. The channels of the standards are disposed outwardly. The standards at their lower ends are connected together by a pivotally mounted'base, generally indicated at 9 and which permits of the oscillating of the The base 9 is formed of a hollow casting 10 provided at each end with bearings 1l for a pivot bolt 12, and the later extends through and projects from each end of the casting 10. Near each end of the top of the Casing 10 a lubricant well 13 is provided and leading therefrom to the bolt 12 is a lubricant supply port 14. At each end of the casting 10 is an upwardly extending and inwardly inclined arm 15, which extends into the lower endof the channelY of a standard and is ixedly secured therewith by aplurality of holdfast devices 16 whereby the standards are connected together at their lower ends With the casting 10 disposed `below said ends. At each end of each side of the casting 10 is a laterally extending and upwardly inclined apertured ear. The ears at one side of the casting 10, are indicated at 17 and those on the other side at 18'. The function of the apertured ears will be presently'referred to.y

post.l

a pair of parallel, spaced I-beams 20 of appropriate length and secured against the outer face of the web of each beam in proximving member 22 for the pivot bolt 12.

' ments, eachformed of a plate 25 provided on its inner face, near its upper lend with a circular boss 26', and below, as well as spaced from the flange 26, with an inwardly disposed tubular extension 27 providing a bearing. On the top of each extension is a lubricant well 28 and leading therefrom to the interior of the extension is a lubricant supply port 29. rl`lie plates 25 are of less length than the length of the perpendicular portion 8', and have their upper ends flush with the upper ends of the portions 6.V The plates 25 are arranged in opposed, Yspaced relation, and are secured by holdfast devices36l against the inner faces of the portions 8 of the standards.

4lvlounted at its ends upon the circular bosses 26 is a combined'spacing and bracing niember 31 of tubular forni which abuts against the inner faces of the plates 25. The membei' 31 forms a lubricant reservoir 33 having outlets 33 iii its bottom for supplying lubricant to the wells 28.

Journaled in the bearings formed by the extensions 27 is a trunnion element 32 for the oscillatory beam, to be presently referred to, for the pump rod, also to be hereinafter referred to. The truniiioii element 32 is of T-shapedV form and has its stein 34 secured to the oscillatory beam eccentrically thereof.

Secured within the channel of each standard a substantial distance above the lower end thereof, aswell as projecting from each side of the standard is a coupling member 23 formed with a pair of oppositely extending apertured ears 29. Theholdfast means for the coupling members 28 are indicated at 30.

One pair of ears 28, associatedwith the ears 17and'the other pair with the ears 18. VConnected to the pairs of associated ears is a pair of'oppositely extending reinforcing bars 31 foi-the post. l'llie bars 31 extend through the apertures in theears and carry securing nuts 32 on their ends and which abut against the outer faces of the ears.V

The oscillatory beam is referred to generally at A and consists of a pair of oppositely Y disposed, spaced, parallel channel irons 33,

34, having the flanges thereof directed outwardly. The trunnion element 32 has its stem 34 extended between the irons 33, 34, and is secured to these latter by the holdfast device 34 and is positioned between the transverse median of the beam A and the rear end thereof.

The rear end ofthe beam A, has depending therefrom, a counterweight 36. The channel bars or members of the beam A at the forward terminal portion thereof have spaced openings 37, 38 and 39 and the openings in one channel bar aline with the openings in the other channel bar. rlhe openings 37, 38 provideiiieans for adj ustably connecting a casting" 40 between the channel bars 33, 34 rearwardly of the openings 39. The casting 40 provides a lubricant reservoir and said casting 40 depends below the beam A and is formed with a globular portion 41l which extends from the bottom thereof. The globular portion 41 coacts with a concave cup 42 connectedto the upper end of an actuating arm 43 which will be hereinafter referred to. The elements 40, 4l and 42 are constructed'in a. manner asdisclosed in my application Serial No. 168,07 6, i'iled February 14, 1927.

The top flanges of the I-beams 2O are formed with openings 44 to provide for adjustably connecting thereon a base or suppor ing plate 45, by the -holdfast devices 46. rllhe ends of the plate 45, at each corner thereof is formed with an opening 45 for the passage of a holdfast device 46. The plate 45 is also formed with two spaced pairs of transversely extending slots 47. The slots of each pair are disposed in lengthwise arrangement relative to each other and also in spaced relation. The lower face of the plate 45 in proximity to each end is formed with a transversely extending shoulder 48 which abuts against the inner side edge, at the top of an I-beam 20. Formed integral with the upper face of the plate 45, centrally thereof, at its rear side is a holding` lug 49 including a vertical and a horizontal leg and with the latter extending forwardly from the upper end of the latter.

Mounted on these holtrfast devices 46, which extend through `the forward openings 45 are spacing collars 50 for the apertured rear ends of a pair of adjusting yrods 51 which project forwardly from Vthe platel 45, and extend through upstanding flanges 51 formed at the rear ends of a pair of longitudinal extensions 51 which projeetrearwardly from a substantially V-shaped wellcasing retaining'niembei? or element 52..

The extensions 51'. are provided with oppositely disposed flanges 53 which overlap the heads of the Lbeams 26, see Figure 4, whereby the member 52 is slidably connected to said beams. The securing nuts 54 of the forward holdfast devices 46 clamp against the afpertured rear ends of the rods 51 and through said ends extend the bolts of said forwa'd holdfast devices 46. The member 52 surrounds and abuts against the well casing or tubing 54. 'e

Y Carried by each of the rods 51 and thread ably engaging the forward terminal portions thereof are clamping nuts 55 for maintaining the retaining member 52 in adjusted position.

The retaining member 52 can be adjusted rearwardly and forwardly with respect to the beams 2O for the purpose of retaining the well casing or tubing 54 in the 'desired position and further' for retaining the casing 54 relative to the pump rod 96 so that the stroke of the latter will be absolutely vertical relative to the casing or tubing 54. V

Secured to each of the beams 2O and against the outer face thereof are upstanding coupling pieces 57. The securing means for the coupling pieces 57, consists of bolts 58, each carrying clamping nuts 59. The coupling pieces 57 having offset upper portions 57 provided with openings 57 through'which pass headed bolts 58 carrying retaining plates 59 andV securing nuts 60. The coupling pieces 57 are positioned at the rear of the plate 45, project upwardly therefrom and the offset portionsY 57 extend slightly above the bearings 57.

Depending from the beam A, is a tapered supporting yoke 61, having spacing lugs 61 at its top for the channel irons 33, 34. The

lugs 61 abut the inner faces of the irons.V

The yoke 61 has the lower portion of each side thereof straight, as at 62, and secured to the outer face of each portion 62 is a casting 63 formed with a tubular extension 64 providing a bearing. Holdfast devices 65 and 66 secure a casting 63 to each portion 62 of the yoke. Retaining plates 67 are carried at the outer ends of the holdfast devices 66. Mounted on each bearing 64 is an adjustable sectional block 68 formed with a pair of openings 69 extending from the top to the bottom of the block. Mounted on the bolts 58 are bearing blocks 7 0 having a pair of oppositely extending apertured ears 71 at the top thereof. lVithin each block 70 is arranged a liner 70. See Figure 13. The liner 70 is provided at its top with a .lug 70 formed with a seat 71 into which extends a pressure exerting means consisting of a pin 7 1. which depends from a plate 72 iounted on the reduced, threaded lower terminals 72 of the rods 72. The reduced terminals 7 2 provide shoulders 72 which abut the plate 72. Each block 70 is formed with an opening 70 for the pin 71 and also with a recess 73 for the lug 70. On rotation of the rods 72, in one direction, plate 72 will cause movement of the pin 71 to exert pressure onthe liner 70. An adjustable block 68 associates with a bearing block 70 and is connected therewith by a pair of rods 72 having their upper ends clamped to the block 68, by the nuts 73, and their lower ends clamped to the ears 71 of the block 70 by the nuts 74. The nuts 73 adjustably connect the sections of each block 69 together. Secured to the sides ofthe yoke 61, as at 75 are forwardly and rearwardly extending inclined brace members 76, 77 respectively, which have their upper ends secured to the beam A. The

members 76 are arranged forwardly of the Samson post and the members 77 extending through and rearwardly thereof. The elements 61, 70, 76 and 77 act as a pivoted truss or rein forcement for the beam A and prevents the sagging or distortion thereof during its oscillations. c y

Arranged over the beams 20, and forwardly with respect to the standards 7, 8 is an oscillatory swing referred to generally by the reference character B and which includes a horizontally disposed arm 77 and a vertically disposed arm76 and with the latter of less length than the former. The arms 76', 77 are connected together by brace members 78.V The swing B is constructed in a manner as set forth in my application Serial No. 168,- 07 6, filed February 14, 1927. Secured to the arm 76 at a point between its transverse median and its rear end is a casting 79, formed with an inverted T-shaped extension 80 which depends therefrom and has its lower end mounted in the concavity 81 of a bearing member 82mounted on the plate 45. Holdfast devices 84 and 85 extend down through the front and rear of the bearing member 82 and through the slots 47 of the plate 45. The bearin(Y member 82, has a rearwardly extendingdange 86 which is overlapped by the holding lug 49, see Figure 5. Secured to the arm 76', at the outer end thereof, is a casting 87, which provides a bearing for a trunnion member 88, fixed to the lower end of the actuating arm 43. The castings 79 and 87 are constructed in the same manner as 'disclosed in my application aforesaid. The arm 77 at its upper end is provided ywith a stirrup box 89, formed with a plurality of grooves 90 for selectivel receiving a stirrup 91 which is connected y the coupling 92, to the pull rod 93. The stirrup box 89 is constructed in the same manner as disclosed in my application aforesaid.

Connected with the forward end of the beam Aby a holdfast 'device 94 extending through the registering openings 39 is a casting 95 which is employed for connecting the Vpump rod 96 to the beam A. The casting 95 is constructed in the same manner as that disclosed in my application aforesaid.

The straight line effect of the pumping rod 96 is produced by direct connection of the beam A to any rigid part of base or frame between the Well and the standards 7 or 8, in such a manner that desired adjustments or change of positions of the elements 40, 80, 89, 51 and 82, will not in any manner inuence or limit the ability of the: bearing element 97 which is carried by the pump rod 96 to produce at all times an absolutely vertical pumping stroke. Y

It is thought the many advantages of a pump rod assembly, in accordance with this lnvention can be readily understood, and al- .Connected therewith, and a coupling connection attached to said bearing, slidably connected with said means and further provided with means 'for connecting it with a well casing, said coupling connection being adjustable.

2. In: a pump rod assembly, supporting means, a swing elementl bearing carried there by, and a coupling mechanism attached at one end to said bearing, slidably connected intermediate lits ends to said means and 'further having its outer end provided with means for connecting it to a well tubing.

3. In a pump rod assembly, supporting mea-ns, a swing element bearing mounted thereon, a coupling mechanism attached at one end to said bearing, slidably connected intermediate its ends to said supporting means and further having its outer end provided with means for connecting it to a well tubing, an oscillatory beam for ope-rating the pump rod, a truss connection between said supporting means and said beam.

4. In a pump rodL assembly, supporting means, a swing element bearing adjustably connected therewith a coupling connection attached to said bearing, slidably connected with said means and further provided with means for connecting'it with a well casing, said coupling connectionbeing adjustable, an oscillatory beam for operating the Vpump rod.I and a truss connection between said support ing means and said beam.

5. In a pump rod assembly, an oscillatory beam for operating the rod, supporting means for the beam, a base tor said means, a truss connection between the base and beam, said truss connection having its top arranged forwardly and rearwardly of said means.

6. In a pump rodvassembly, an oscillatory beam for operating the rod, supporting means for the beam, a base for said means, a truss In testimony whereof, l ailix my signature r hereto.

cLoIsn H. BALDWIN. 

